Mitigating phase noise effect in OFDM system using partial IFFT/FFT and adaptive filtering

Orthogonal frequency division multiplexing (OFDM) is an attractive technique for achieving high-bit-rate wireless communications. The performance of OFDM is severely affected by the nonlinearity of high-power amplifier at the transmitter end and the phase noise of the oscillator. We introduced partial IFFT/FFT and adaptive filtering to reduce the phase noise effect in OFDM. Using a few more oscillators besides significant gain the complexity decreases a bit more.